Tilting-chair iron



(No Model.) I

H. WOLFF.

TILTING CHAIR IRON. No. 353,616. Patentfifljov. 30, 1886.

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mum. 3 9/9 m'fnassss: .fzzwaw WW 7V lhvrra STATES HERMANN IVOLFF, OF MILWAUKEE,

ASSIGNOR TO THE WEBSTER MANU- FACTURING COMPANY, OF MENASHA, WISCONSIN.

TlLTlNG-CHAIR IRON.

SPECIFICATION forming part of Letters Patent No. 353,616, dated l l'avember 1885- 'Application filed May 1,1886. Serial No. 200,760.

struction, as will be fully described hereinafter with reference to the accompanying drawings,

in which- Figure 1 represents a side elevation of my chair-iron in operative position; Fig. 2, alongitudiual vertical section, and Fig. 3 a top plan view, of the same.

Referring by letter to the drawings, A rep resents an elevating screw or spindle socketed at its upper end to a bifurcated standard, B,

the bifurcations of the latter being joined at the top by a crosspiece, a. A transverse bolt, 0, serves to pivot-ally unite the standard B with a spider-frame, D, to which latter the chair seat E is secured. The spiderframe consists 2 ofa single casting comprising two longitudinal bars, I), united by cross-pieces c d, the ends of the bars being enlarged and provided with perforations e, for the screws that serve to secure said frame to the chair-seat E. The rear crosspiece, 0, is centrally reduced and rounded, as

shown atf, to form a bearing for the upper jaw end of a link, F, that forms a toggle-connection with a rectangular link, G, the latter having its front end shouldered and reduced, whereby bearingsg are formedin notchesh of the standard B, and flanges z are formed to come upon the outside of said standards to prevent lateral displacement of this link. A cross-piece, 7c, of the link G is provided with a central hookshaped lug, on, that serves to engage the rear at its free end with a hand-wheel, L.

The bushing I has a central recess, a, that receives the enlarged end 0 of a bar, M, the

rear or reduced end of this bar being received by a notch, p, in the toggle-link F. The en;

larged end of the bar M that comes within the bushing I is hollowed out, as shown at r, to

(No mod cl.)

form a bearing for the screw-rod K. By operating the screw-rod K the bushing I is moved to or fro, as may be found' desirable, thereby effecting a correspondingly'increased or diminished tension of the spring H.

The longitudinal bars I) of the spider'frame' D have a rocker bearing on shoulders s of the standard B, and to limit the movement of this frame these side bars are sufficiently enlarged to form right-angular stops t, designed to impinge against the forward ends ot'said standardshoulders.

In someinstances it may be desirable to employ two springs, instead of one, as above described, thereby securing an easier-working ,chair, and this construction is readily effected by increasing the width of the spider-frame and duplicating the spring and the parts necessary to its operation.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a standard fast to a spindle and a spider-frame pivotally united to the standard, of a rectangular link toggled at its rear end to the spider-frame and having its forward end provided with bearings designed to engage notches in said standard, aspiral spring connected at one end to the link and at the other to a bushing operative on a screw-rod, and a bar having its ends respectively received by the toggle and bushing, as set forth.

2. The combination, with a standard fast to a spindle and a spider-frame pivotally united to the standard, of a toggle-link uniting the spider frame with a rectangular link, the latter havinga bearing in the standard, a spiral spring secured at one end to the rectangular link and at the other to a recessed bushing operative on a screw-rod, and a bar having its front end adapted to fit said bushing and its rear end received by a notch in the toggle-link, as set forth. I

3. The combination of a bifurcated standard fast to a spindle and provided with shoulders, and a spider-frame pivoted to the standard and having rocker-bearings on the shoulders thereof, with a spiral spring secured at its rear end to alink toggled to said spider-frame, and a bushing threaded to receive the forward end of the spring and operative on a screw-rod that bears against a rod extending from the-bushing to the toggle-connection of thespidenframe, as set forth.

4. In a tilting-chair iron, aspider-frame comprising longitudinal side bars having enlarged perforated ends and integral cross-pieces uniting the side bars, the rear eross-piece centrally reduced to form a bearing, and said bars pivotally connected to a bifurcated standard fast.

on a spindle, in combination with a toggle-link operatively connected to the rear cross-piece I of the spider-frame, a rectangular link pivoted to the toggle-link, a spiral spring connected'at one end to said rectangular link, a bushing operative on ascrewmod andin turn connected to the other end of the spring, and a bar ar- V ranged to haveits respective ends in impingenent against said toggle-link and screw-rod, as set forth. 7

5. In a tiltingchair iron, a rectangular link having its front end shouldered and reduced and its rear end toggled to a spider-frame pivotally connected to astandard that is fast on a spindle and provided with notches for the reduced end of the'link, in combination with a spiral spring secured at one end to thereotangular linkand at the other to a recessed bushing operative on a screw-rod, and a bar,

fitting the recessed portion of the bushing and impinging against the toggle'connection of the spider-frame and said link, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State-of VVisconsin, in the presence of two witnesses.

HERMANN. WOLFE. Witnesses:

H. G. UNDERWOOD, MAURICE F. FREAR. 

